| On videotape, say | 17 |
| On video | 8 |
| On very short notice | 20 |
| On Ventura Blvd., say | 21 |
| On Ventura Blvd., perhaps | 25 |
| On Ventura Blvd., e.g. | 22 |
| On vacation, say | 16 |
| On vacation, perhaps | 20 |
| On vacation, often | 18 |
| On vacation | 11 |
| On twos, rather than fours | 26 |
| On two feet | 11 |
| On TV, say | 10 |
| On TV he had heroes | 19 |
| On TV | 5 |
| On trial | 8 |
| On tranquilizers | 16 |
| On track, mentally | 18 |
| On track to win | 15 |
| On topic | 8 |
| On top, poetically | 18 |
| On top of, to poets | 19 |
| On top of, to bards | 19 |
| On top of, in poetry | 20 |
| On top of things | 16 |
| On top of the world? | 20 |
| On top of the world | 19 |
| On top of that | 14 |
| On top of it | 12 |
| On top of everything else | 25 |
| On top of everything | 20 |
| On top of | 9 |
| On top it can have a whitecap | 29 |
| On top | 6 |
| On too many projects | 20 |
| On toast, in diner slang | 24 |
| On toast, at a diner | 20 |
| On to | 5 |
| On tiptoe ballet position | 25 |
| On time | 7 |
| On this very spot | 17 |
| On this spot | 12 |
| On this side: Prefix | 20 |
| On this side of: Prefix | 23 |
| On this side of the moon | 24 |
| On this planet | 14 |
| On this earth | 13 |
| On thin ice | 11 |
| On the____ | 10 |
| On their way | 12 |
| On the: It. | 11 |
| On the _____ (very angry) | 25 |
| On the _____ (furtively) | 24 |
| On the _____ (declining) | 24 |
| On the _____ | 12 |
| On the ____: free | 17 |
| On the ____: failing | 20 |
| On the ____: close behind | 25 |
| On the ____ (precisely) | 23 |
| On the ____ | 11 |
| On the ___ with | 15 |
| On the ___ wavelength (in accord) | 33 |
| On the ___ vive (watchful) | 26 |
| On the ___ vive (alert) | 23 |
| On the ___ vive | 15 |
| On the ___ one's tongue | 27 |
| On the ___ of (chummy) | 22 |
| On the ___ of (approaching) | 27 |
| On the ___ my tongue | 20 |
| On the ___ (unfriendly) | 23 |
| On the ___ (under consideration) | 32 |
| On the ___ (set aside) | 22 |
| On the ___ (secretly) | 21 |
| On the ___ (running) | 20 |
| On the ___ (running away) | 25 |
| On the ___ (recuperating) | 25 |
| On the ___ (punctually) | 23 |
| On the ___ (punctual) | 21 |
| On the ___ (prompt) | 19 |
| On the ___ (preparing for battle) | 33 |
| On the ___ (precisely) | 22 |
| On the ___ (out of order) | 25 |
| On the ___ (not working) | 24 |
| On the ___ (not speaking) | 25 |
| On the ___ (not in use) | 23 |
| On the ___ (like a perp who hasn't been nabbed) | 51 |
| On the ___ (like a fugitive) | 28 |
| On the ___ (inoperable) | 23 |
| On the ___ (inactive) | 21 |
| On the ___ (in trouble) | 23 |
| On the ___ (in hiding) | 22 |
| On the ___ (in flight) | 22 |
| On the ___ (in behalf) | 22 |
| On the ___ (honest) | 19 |
| On the ___ (hiding) | 19 |
| On the ___ (hiding out) | 23 |
| On the ___ (going to pot) | 25 |
| On the ___ (getting better) | 27 |
| On the ___ (gangland phrase) | 28 |
| On the ___ (furtively) | 22 |